A symposium on sediment dynamics in geophysical flows using two-phase flow methodology

使用两相流方法论地球物理流中沉积物动力学研讨会

• 批准号: 1849092
• 负责人: Tian-Jian (Tom) Hsu
• 金额: $ 1.5万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-12-01 至 2019-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1849092&HistoricalAwards=false
• 关键词: symposium; sediment; dynamics; geophysical; flows

This award will provide funding to the University of Delaware to facilitate the participation of young researchers and to support travel for young scholars as invited speakers to the 4th Symposium on Two-phase Modelling for Sediment Dynamics in Geophysical Flows will be held on September 17 ? 19, 2019 in the University of Delaware, Newark, DE, USA. The symposium aims at accelerating advances in sediment transport by bringing together fluid physicists, oceanographers, geologists, geomorphologists, and engineers in terrestrial, coastal and marine systems. In addition to oral and poster presentations, the symposium will feature achievements of young researchers and a workshop for open-source modeling tools. The participation of oceanographers, geomorphologists and geologists, especially those early career researchers (graduate students, postdoctoral researchers and early career scientists and faculty) will be facilitated by reducing participation costs. Furthermore, this symposium will be expanded to cover more field observation, laboratory experiments and instrumentation for measuring multiphase flow in geophysical flow. A balanced coverage of terrestrial, coastal and marine applications and including multiphase flow applications beyond sediment transport, such as air-sea interaction and flow over vegetation is planned. This activity seeks to complement the tremendous progresses made in the past two decades benefited significantly from regional scale open-source models and facilitate the dissemination and development of similar open-source models for wave-scale and turbulence/grain-scale processes that started to emerge recently. This symposium will promote the creation of open-source community-driven numerical modeling tools for small-scale processes by hosting a 3-hour clinical workshop for an opensource Eulerian two-phase model for sediment transport, SedFoam. Sediment transport dynamics involve complex nonlinear interaction between waves, currents, turbulence, and sediment particles with a range of particle inertia and concentration. It has been one of the most challenge fluid mechanics problems attracting many researchers interested in turbulent flows, multiphase flows and granular flows. In the context of earth surface processes, additional challenges arise from vastly different temporal and spatial scales to further address pressing issues such as sediment source to sink, impact of sea-level rise and increase storm intensity on shoreline evolution, coastal habitat and the sustainability of infrastructure and coastal community resilience. To accelerate the progress in understanding the physical mechanisms controlling coastal changes and earth surface processes, it is important to bring together communities from the areas of fluid mechanics, physical oceanography, geomorphology and geology into a symposium to share their findings, nourish collaboration and to provide new perspectives. The symposium will focus on: (1) Addressing cross-scale modeling challenges in geophysical flows. (2) Identifying mechanisms behind several intriguing field observations and develop benchmark problems for high-fidelity, fluid-mechanics-based investigations that the community can address in the next couple of years. (3) Advancing sediment transport modeling and promote existing and new open-source community modeling tools.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项将为特拉华大学提供资金，以促进年轻研究人员的参与，并支持年轻学者作为受邀演讲者参加将于9月17日举行的第四届地球物理流动泥沙动力学两阶段建模研讨会。2019年11月19日在美国特拉华大学举行。研讨会的目的是通过汇集陆地、海岸和海洋系统的流体物理学家、海洋学家、地质学家、地貌学家和工程师，加速沉积物运输方面的进展。除了口头和海报展示外，研讨会还将展示年轻研究人员的成果和开源建模工具研讨会。海洋学家、地貌学家和地质学家的参与，特别是那些早期职业研究人员（研究生、博士后研究人员和早期职业科学家和教师）的参与将通过降低参与成本而得到便利。此外，本次研讨会将扩展到更多的现场观测、实验室实验和仪器测量地球物理流中的多相流。计划平衡覆盖陆地、沿海和海洋应用，包括除沉积物运输之外的多相流应用，如海气相互作用和植被流动。这项活动旨在补充过去二十年来从区域尺度开放源码模式中获得的巨大进展，并促进最近开始出现的波浪尺度和湍流/粒度过程的类似开放源码模式的传播和发展。本次研讨会将通过举办一个3小时的临床研讨会，为沉积物输运的开源欧拉两相模型SedFoam，促进开源社区驱动的小规模过程数值建模工具的创建。泥沙输运动力学涉及波浪、水流、湍流和泥沙颗粒之间复杂的非线性相互作用，具有一定的颗粒惯性和浓度范围。它一直是最具挑战性的流体力学问题之一，吸引了许多对湍流、多相流和颗粒流感兴趣的研究人员。在地球表面过程的背景下，由于时间和空间尺度的巨大差异，进一步解决诸如沉积物来源沉降、海平面上升和风暴强度增加对海岸线演变的影响、沿海栖息地和基础设施的可持续性以及沿海社区的复原力等紧迫问题也面临着额外的挑战。为了加快理解控制海岸变化和地表过程的物理机制的进展，重要的是将流体力学、物理海洋学、地貌学和地质学等领域的社区聚集到一个研讨会上，分享他们的发现，促进合作并提供新的观点。研讨会将重点关注：(1)解决地球物理流动中的跨尺度建模挑战。(2)确定几个有趣的现场观察背后的机制，并为高保真度、基于流体力学的调查开发基准问题，该社区可以在未来几年内解决这些问题。(3)推进输沙建模，推广现有和新的开源社区建模工具。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。